updated crypto and uuid versions (#188)

Author: shamis

pubspec.yaml

@@ -7,7 +7,7 @@ environment:
   flutter: ">=1.10.0"
 
 dependencies:
-  crypto: ^2.1.2
+  crypto: ^3.0.0
   flutter_webrtc: ^0.5.8
   intl: any
   logger: ^0.9.0
@@ -16,7 +16,7 @@ dependencies:
   random_string: ^2.0.0
   recase: ^3.0.0
   sdp_transform: ^0.2.0
-  uuid: ^2.0.2
+  uuid: ^3.0.2
 
 
 dev_dependencies: